Calipers



June 7, 1927.

H. A. sT. JOHN ET AL CALIPERS Filed April 25, 1925 TTORNEY Patented June7, 1927.

usirso STATES PATENT OFFICE.

sinner A. sr. JOHN AND Joan E. entrain, OF UTICA', NEW YORK.

oALIPE s.

Application filed April 25, 1325. Serial No. 25,899.

Our invention relates to calipers and we declare the following to be afull, clear, concise and exact description thereof sufiicient to enableanyone skilled in the art to which it appertains to make and use thesame reference being had to the accompanying drawand, therefore, notreadily accessible except by opening a cover, an invention is designedto be useful especially in measuring the diameters of such ournals.Furthermore, the

calipers will be useful not only'in'raih oad shops but also in any andall shops of any nature, where inspection and repairs-are made toequipment. 'j

The object will be understood by referring to the drawings, in which: rFigure 1 isa perspectivevi'ew of'the device showing parts broken away;

Figure 2 is adetail view showing a locking latch and immediate partsemployed in the device.

Referring more particularly'to the draw ings, the device embodiesextension members 1, 2 that are, in each instance, bent downwards atright angles at 3,and again mwards towards each other at'l, 4. The ends4, 4 are adapted to make contact with the diametrically opposite sidesof the journal or axle 5 to be measured. Furthermore, inasmuch as axle 5of a railroad car is equipped on itsouter end with a boss or' collar 6,ends 1, 4 will permit of the clearance of said collar 6. j

Extension members 1 and 2 are hinged at 7 to members 8 and 9respectively, whereby extension members 1 and 2 can be folded back andupon a plane with handles 10, 10 of the calipers to make said membersco1- .lapsible. Draw bolts 11, 11 are mounted on extension members 1and'2 and engage eyelets 12, 12 fastened to members 8 aud t), whereby tohold extension members 1 and 2 in prolongation of members 8 and 9 to bein operative position.

1 Furthermore, members 8 and 9 are united to links 15, 15 by pivots 16,16 and links 15, 15 are united in turn to the lever arms 20, 20 ofhandles 10, 10 by pivots 21, 21. It will be observed that one oflever'arms 20 is offset at 22, whereby its free end 23 will be in thesame plane with the free end '24 of the other arm 20. Arms 20 arefulcrumed at 25 .upon bolt 26. The rearwardly extending parts are formedinto handles 10, 10

adapted for the insertion of the fingers to aid in manipulating thecalipers.

Extension members 1 and 2move par-- allel to each other, whereby to givethe correct measurement of the diameters of axles To this end, anenlarged plate is rigidly mounted to member 1 by brazing or otherwise, Asleeve '31 is formed on plate 80 for the sliding reception of rod 34,which extends therethrough andbeyond to accommodate the lateralmovementof member 1. One end of rod 34 is fixed within a sleeve or hearing 32formed integral with member 2 by means of a cotter pin 33 that projectsthrough bearing 32, an aperture in rod 34 and member 2.

Removing cotter pin 83 will allowfor the removal of rod 34 for packingpurposes. v

Moreover, plate 30 is recessed for the sliding-reception of graduatedscale 40 that is attached at one end by a screw 41 to abracket 42projecting laterally from member 2 and offset therefrom, whereby theupper surface of scale 40 will lie flush with the upper surface ofenlarged part 43 of member 2. An indenture or open recess 44 is formedon plate 30 to allow for the clearance of the head of said screw 41.

In order to accommodate a more or less greater movement of extensionmember 1 and 2 to a lesser movement of handles 10, 10, the angle oflinks 15 relative to lever arms 20, 20 can be fixed by adjustabledevices, embodying flat springs that are riveted at one end, in eachinstance, to links 15. Each of the free ends thereof, however, isequipped with an upstanding lug 52 adapted to project up through anaperture in links 15 and into an open recess 53 formed in the end oflever arm 20. In order to release or withdraw. lug 52 from one of theopen recesses 53 formed in the end of each of lever arms 20, 20, thereis provided a linger piece 54 fixedtospring 50 and extend ing 11 awardthrough an alined recess in link 15. aid linger piece 5 1 will extendnecessarily a little higher than lug 52 so that when the finger ispressed. thereon to depress spring 50 lug 59, will clear open recess 53,when the top o1": finger piece 5-4: is pressed down flush with the topsurface of links 15. Immediately lug 52 has been pressed down clear ofopen recess 53 in the end of lever arm 20, link can be turned on itspivot 21 to increase or decrease the angle relative to lever arm 20. Log52 under force of flat spring 50 will snap back into the correspondingopen recess 5 ot lever arm when link 15 has been turned into suchposition that lug 52 will come opposite thereto.

In using the calipers, the railroad yardman, after the train has come toa stop,

will open the cover, not here shown, of the 1ournal box and thrust theextension members 1 and 2 therein in such manner and .move handles sothat theends thereof will so that the ends 4:, 4; will make contactalong the accessible part-of the axle to determine any flaws orunevenness therein. The measurement 0t the diameter can be determined byreading the scale at 55 and at 56 for.

more accurate determinz'ition. The readings will be made at 57 where theedge of plate 30 16 contiguous with said scale 40. In the event that allof the readings are not the same, and a flaw is discovered, thereby, thelocation of such flaw will be fired by readfing the graduated scale 58on extension member 1. I

In order to limit the movement oft handles 10, 10 when. measuring. axles5 of large di- 50 and links 15 as above stated.

- A set screw 60 having a bearing in enlarged plate is adapted to makecontact with. graduated scale 4.0, whereby to hold the parts'in setposition. when ends 4;, 4 of extension members 1 and 2 are brought intocontact with the diametrically opposite sides of the journal 5. Theparts will be held thus by said screw 60 until the reading of thegraduated scale 40 can be had.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent is:

1. In a calipers,elongated members having ends bent at right anglesthereto to ongage the extern a 1, surface of a journal, means wherebysaid members are maintained in parallel relation to each other, a linkpivoted to each of said members and a lever adjustably secured to eachlink, said levers being pivoted to each other at an. intermediate point,whereby to move said links and thereby cause movement of the elongatedmembers towards and away "from each other while maintaining theirparallel relation.

-' 2. In a calipers, two elongated members diate point, whereby themovement of said levers will efl'ect a relative movement of saidelongated members: The calipers will be moved longitudinally 4. In acalipers, elongated members, a member engaging one elongated member andslidingly mounted as to the other, whereby to maintain said elongatedmemhers in parallel relation to each other, a link pivoted to each ofsaid elongated members,

a lever adjustably secured to each link, said.

levers being pivoted to each other at an intermediate point, whereby tomove said links and thereby cause movement of the elongated memberstowards and'away from each other while maintaining their parallelrelation, and means whereby tofix the relation I of said links with saidlevers.

5. In a calipers, hinged elongated inembers, amember engaglng oneelongated memmember engaging one elongated member and her and slidinglymounted as to the other,

whereby to maintain said elongated members in parallel relation to eachother, a link pivoted'to each of said elongated members, a leveradjustahly secured to each link, said levers being pivoted toeach otherat an intermediate point, recesses formed in said levers, and springactuated means mounted on said links and adapted to engage the recessesformed in said levers, whereby to move said links and thereby cause amovement of the elongated members towards and away from each other whilemaintaining their parallel relation, and means whereby to fix therelation of said links with said levers.

6. In a calipers, elongated members, a rod engaging one member andslidingly mounted as to the other, whereby to maintain said members inparallel relation to each other, a link pivoted to each ofsaid members,a lever adjustably secured to each link, said levers being pivoted toeach other atan intermediate point, and means for holding said levers ingiven relation to said links whereby to members.

engaging one member and slidingly mounted 7. In a calipers, elongatedmembers, a rod en agingone member and slidingly mounted as to the other,whereby to maintain said members in parallel relation to eachother, alink pivoted to each or said members, a lever adjustably secured to eachlink, said levers being pivoted to each other at an intermediate point,spring pressedmeans mounted in said links and levers havingrecesses forthe reception of said spring pressed means,

Whereby to govern the extent of the mover ment of said members.

8. In a calipers, elongated members, a rod 15 as to the other, wherebyto maintain said link pivot-ed to each of said members, a leveradjustably secured to each link, said levers being pivoted to each otherat an intermediate point, spring pressed lugs mounted in said links,levers having recesses adapted for the reception of said lugs, wherebyto govern the extent of the movement of said mem bers, and means formoving said" lugs free from said recesses.

In testimony whereof we aflix our signatures.,

JOHN F. GRIFFIN. HENRY A. ST, JOHN.

